Study of Θ+(ududs̄) in lattice QCD with exact chiral symmetry
Journal
Physical Review D - Particles, Fields, Gravitation and Cosmology
Journal Volume
72
Journal Issue
3
Pages
1-10
Date Issued
2005
Author(s)
Hsieh, T.-H.
Abstract
We investigate the mass spectrum of the pentaquark baryon (ududs̄) in quenched lattice QCD with exact chiral symmetry. Using three different interpolating operators for Θ, we measure the 3×3 correlation matrix and obtain the eigenvalues A±(t) with ± parity for 100 gauge configurations generated with Wilson gauge action at β=6.1 on the 203×40 lattice. For the lowest-lying JP=1/2- state, its mass is almost identical to that of the KN s wave, while for the lowest-lying JP=1/2+ state, its mass is smaller than that of the KN p wave, especially for the regime mu
Type
journal article